2,6-TOLUENE-DIISOCYANATE (TDI)
Chemical Identification | |
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CAS # | 91-08-7 |
Formula |
C₉H₆N₂O₂ |
Synonyms |
2,6-toluene diisocyanate; 2,6-TDI; 2,6-diisocyanato-1-methylbenzene; 2,6-diisocyanatotoluene |
Physical Properties | |||
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Physical description | Colorless to pale-yellow solid or liquid with a pungent odor. | ||
Boiling point | 264-271°F | Molecular weight | 174.2 |
Freezing point/melting point | 68-72°F | Vapor pressure | 0.5 mmHg at 77°F for 80% 2,4:20%; 2,6 TDI mixture |
Flash point | Vapor density | 6 | |
Specific gravity | 1.2244 at 68°F | Ionization potential | |
Lower explosive limit (LEL) | 0.9% | Upper explosive limit (UEL) | 9.5% |
NFPA health rating | NFPA fire rating | ||
NFPA reactivity rating | NFPA special instruction | ||
Vapor hazard ratio (VHR) | |||
Historical exceedance percentage | |||
Target organs |
Monitoring Methods Used by OSHA | ||||||
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Analyte code (IMIS no.) | T177 | |||||
Sampling group | ||||||
Sampler/Sampling media | Isocyanate Sampling Filter Kit - GFF (37 mm, open-faced) coated with 1 mg 1-(2-pyridyl)piperazine [SLTC103] | |||||
Sampling time* | 15 min |
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Sampling volume (TWA)* | 15 L |
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Sampling flow rate (TWA)* | 1 L/min |
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Sampling volume (STEL/Peak/C)* |
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Sampling flow rate (STEL/Peak/C)* |
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Analytical method instruments | UHPLC | |||||
Method reference | OSHA 5002 (fully validated) | |||||
Notes | Refrigerate coated filters until used. Sample open-faced!! |
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Special requirements |
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* All sampling instructions above are recommended guidelines for OSHA Compliance Safety and Health Officers (CSHOs), please see the corresponding OSHA method reference for complete details.
Wipe Method | |
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Sampler/Sampling media |
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Bulk Method |
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On-Site Screening Techniques | ||||||
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Device | Detector tube | |||||
Model/Type | Dräger - Toluene diisocyanate 0.02/a, 6724501 | |||||
Sampling information (see manufacturer instructions) |
25 strokes, approx 0.02-0.2 ppm range, uncertainty 30% |
Exposure Limits | |||||||
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OSHA PEL
8-hour TWA (ST) STEL (C) Ceiling Peak |
NIOSH REL
Up to 10-hour TWA (ST) STEL (C) Ceiling |
ACGIH TLV©
8-hour TWA (ST) STEL (C) Ceiling |
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PEL-TWA |
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REL-TWA |
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TLV-TWA |
0.001 ppm (inhalable fraction and vapor) [2015] |
PEL-TWA |
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PEL-STEL |
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REL-STEL |
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TLV-STEL |
0.005 ppm (inhalable fraction and vapor) [2015] |
PEL-STEL |
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PEL-C |
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REL-C |
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TLV-C |
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PEL-C |
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Skin notation |
NA |
Skin notation |
NA |
Skin notation |
Y |
Skin notation |
NA |
Notes: |
Notes:
Not established |
Notes:
dermal sensitizer (DSEN), respiratory sensitizer (RSEN) |
Notes:
Not established |
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Health factors: See NIH-NLM PubChem. | IDLH | ||||||
Carcinogenic classifications: IARC-2B, NIOSH-Ca, NTP-R |
Notes:
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AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:
0.01 ppm/0.15 ppm/0.6 ppm |
Additional Resources and Literature References |
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NOAA: CAMEO Chemicals - Toluene-2,6-diisocyanate NIOSH: Pocket Guide to Chemical Hazards - Toluene-2,6-diisocyanate Literature References
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Last Updated Date : 04/19/2021